The Petzl Omni fills a niche market for semi-circular, alloy karabiners. They are primarily used for securing harnesses that use two attachment points that must be connected (such as the Petzl Super Avanti) or where there is likely to be a 3-way load. This multi-directional karabiner is available in two locking systems, the automatic Triact-Lock and the manual Screw-Lock.